Defend jamming, the duralumin housing body has very strong defend jam of action, make system firm run - time.
防干扰，铝合金壳体具有很强的防干扰作用，使系统可靠运行。
Electromagnetic pollution can jam the electric equipment, and especially it can hurt people's body.
电磁污染能够使电子仪器失灵，特别是能伤害人体。
Right-elbow is in front of my body not jam to the side, my left arm is swinging towards the golf ball, and my wrists have maintained their hinge. My left arm is close to my chest;
右手臂右手肘是在我的胸口的前方，不是挤在我的身边的腰上，我的左手臂是往球位挥过去，我的手腕还是保持它的弯曲（hinge）。
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